The Rear Support Wheelchair requires minimal assembly. An Allen wrench is the only tool required for assembly, and is provided along with written assembly instructions. Your cart will arrive in two parts (main frame and set of wheel blades with wheels). Assembling the cart is a simple process if you follow the instructions. Please click on the link below to view the assembly instructions online. Please feel free to send over pictures of your dog in the cart as soon as you have the cart fit at home to our fitting specialists.